Lock-out-proof doorknob lock and latch set



Nov. 16, 1954 c, CERF, JR

LOCKOUT-PROOF DOORKNOB LOCK AND LATCH SET 2 Sheets-Sheet 1 Filed Feb.16, 1952 .M 1 5 3 :i 9% n I 2 O m n F T 18 z 6 .I z a 6 a 7 a m I [I1 44 7 4 w m mw 9 7 2 4 INVENTOR ROBERT C. CERF JR.

ATTO RNEY Nov. 16, 1954 R. c. CERF, JR

LOCK-OUT-PRCOF DOORKNQB LOCK AND LATCH SET 2 Sheets-Sheet 2 Filed Feb.16, 1952 INVENTOR ATTORNEY United States Patent LUCK-QUT-PROOF DOORKNOBLOCK AND LATCH SET Robert C. Cerf, .l'n, North Hollywood, Calif.,assignor to Hollymade Hardware Manufacturing Company, Los Angeles,Calif., a corporation of California Application February 16, 1952,Serial No. 271,945

2 laims. (Cl. 70-147) This invention relates to a door knob lock andlatch set with inside push button locking means for the outside knob andkey operable locking and unlocking means for the outside knob.

The general obiect of the invention is to provide a lock-out-proof doorknob lock and latch set. Another object is to provide an improved doorknob lock and latch set particularly adapted for outside doors in whichthe outside knob may be locked against turning by a push button locatedin the inside, which locking is released when the retracting mechanismis actuated by pushing in the latch bolt as by contacting the strikeplate upon closing the door on which the lock is installed. Anotherobject is to provide in a push button knob and latch set, outsidelocking means requiring the use of a removable key.

These and other objects are attained by my invention which will beunderstood from the following description, reference being made to theaccompanying drawings which form a part hereof in which Fig. 1 is a sideelevational view partly in section of the lock set as installed on adoor;

Fig. 2 is a cross-sectional view partly in elevation taken on the line22 of Fig. 1;

Fig. 3 is a cross-sectional view taken on the line 33 of Fig. 1;

Fig. 4 is a cross-sectional view taken on the line 44 of Fig. 1;

Fig. 5 is cross-sectional view taken on the line 55 of Fig. 1;

Fig. 6 is a cross-sectional view taken on the line 66 of Fig. 1;

Fig. 7 is a cross-sectional view taken on the line 7-7 of Fig. 1;

Fig. 8 is a cross-sectional view taken on the line 8-8 of Fig. 1;

Fig. 9 is a disassembly view in perspective of the locking barmechanism;

Fig. 10 is a perspective view of the outside half of the retractorhousing;

Fig. 11 is a perspective view showing the inside half of the retractorhousing;

Fig. 12 is a perspective view of the inside knob spindle;

Fig. 13 is a spring detent member for the outside knob spindle;

Fig. 14 is a perspective view of the retractor;

1Fig. 15 is a perspective view of a retractor guide p ate;

Fig. 16 is an elevational view showing the steel hearing plates for theretractor;

Fig. 17 is a cross-sectional view taken on the line 17-17 of Fig. 5;

Fig. 18 is a perspective view showing a disassembly of the key actuatedre-dogging sleeve; the key actuated retractor actuating or unlockingsleeve, and the key actuated pin tumbler lock;

Fig. 19 is a perspective view showing the spindle for the outside knob;and

Fig. 20 is a cross-sectional view of the detent pins, taken on the line20-20 of Fig. 5.

In the preferred form of my invention shown in the drawings, the doorknob lock and latch set consists of a body 21 which is generallycylindrical in shape and is assembled from die cast metal half portions,which are here designated 22 for the outside half portion and 23 for theinside half portion, these half portions being assembled to form ahollow retractor body by means of assembly screws 24 whose threaded endsengage holes in the outer half portion 22, the corresponding unthreadedholes 26 in the inside half portion 23 being countersunk at 27 toreceive the heads 28 of the assembly screws 24. In the drawings, Figs. 1and 2, the right hand knob containing the key actuated cylinder lock isreferred to as outside and the left hand knob containing the push-buttonis referred to as inside, this relating to the mounting on a door suchas a house entrance door. The outside half portion 22 of the body isprovided adjacent the body with an outwardly extending axial bearingsleeve 29 which is provided with threads 30 on the outside surface forthe mounting therein of the outside tubular spindle 31 upon the end ofwhich the outside knob 32 is fastened. Beyond the said threads 30 in thediameter of the sleeve is reduced and a covering sleeve 33 is attachedthereto, said sleeve having an access hole 34. An outside rosette 35attached to the clamping plate 36 is mounted on the threads 30 of thesleeve 29 and a pair of spring actuated detent pins 37 set in holes 38in the body 21 press into the dimples 39 on the inside surface of theclamping plate 36 to prevent loosening of the plate and rosette. Theinside half portion 23 of the housing is also provided with an outwardlyextending axial bearing sleeve 40 in which there is mounted for rotationthe inside tubular spindle 41 on the end of which is mounted the insideknob 42. A cover sleeve 43 is attached to the bearing sleeve 40 and isprovided with an access hole 44 for the spring catch 45 holding theinside knob on the spindle 41. An inside clamp plate 46 is provided toabut the door at the margin of the mounting hole, screws 47 beingprovided to fit threaded holes 48 in the inside half body 23, and arosette 49 is removably attached to said clamp plate by the spring catch50. The latch bolt retractor 51 consists of a generally rectangularframe having a pair of opposed fingers 52 which are adapted to engage aslot 53 in the protruding latch bar 54 of the spring biased latch 55,the latch housing 56 being mounted in the door at right angles to theknob spindles, the tabs 57 engaging the latch connecting edges 58 of theretractor guide plates 59. On opposite sides of the retractor 51 thereare provided laterally extending ledges 60 which form the four thrustsurfaces on the retractor against which the cam 61 at the end of theoutside knob spindle 31, the cam 62 at the end of the key actuatedunlocking spindle 63, and the cam 64 and the cam 65 on the inside end ofthe inside knob spindle 41 respectively press against one or the otherledges 60 of the retractor 51 to reciprocate it and thereby actuate thespring latch 55. The retractor 51 is also provided at its edges withbosses 66, one on each edge, which bosses engage longitudinal slots 67in the guide plates 59. The retractor 51 is enclosed on four sides insteel casing consisting of two retractor bearing plates 68 which fit inthe bottom of the cavity of each of the two half portions 22 and 23 ofthe body 21. each beairng plate 68 being provided with a circularopening for the outside and inside spindles 31 and 41 respectively.Rectangular holes or slots 69 are provided in the cavities of the halfportions at the edges thereof which are adapted to engage the tabs 70 onthe guide plates 59, corresponding notches 71 being also provided in theedges of the guide plates 59 to receive the tabs 70 thus keying theparts together. Each of the guide plates 59 is provided at one end witha right angled inwardly projecting tab 72 having a mound 73 which servesto hold one end of each of the coil springs 74 which are disposed oneither side of the retractor 51, the other end of each of the coilsprings abutting the edge shoulders 75 of the retractor, the spring thenlying in the edge channels 76. When assembled, the retractor 51 is thuscompletely incased in the two guide plates 59 and the two bearing plates68 which are anchored together by means of the notches and tabs asdescribed, the retractor being spring pressed in the direction of thefingers 52.

The guide plates 59, at the ends opposite the inwardly projecting tabs72, are bent inwardly to form latch connecting edges 58, these edgesbeing substantially 3 parallel to the opposed faces of the fingers 52 ofthe retractor. These latch connecting edges 58 are arranged to engagetabs 57 on the spring latch bolt housing as shown in Fig. 1.

The inside knob 42 is provided with an axial hole 77 in which there ismounted the push button 78 whose inner end plate 79 is attached on thelocking bar 80, the locking bar extending through the central opening 81in the retractor and extending into the spindle 31 for the outside knob32. The other end of the locking bar is provided with a dogging arm 32at right angles to the bar, this dogging arm being adapted to dog thespindle 31 for the outside knob as will be described. The locking bar 80is provided with trip catch 83 which is arranged to latch over the edge84 of the opening 81 in the retractor 51 and thereby hold the lockingbar Si) in dogging position, so long as the retractor is in the normalposition with the latch extended.

The outside tubular spindle 31 is provided with the outside knob 32, theoutside knob being provided with an axial opening in which there ismounted a cylinder lock 86, the plug 87 of said lock being operable byremovable key 158, and the rotatable plug 37 being attached to a slottedconnector 39 inside the outside tubular spindle 31. The outside knob 32.is attached to the outside spindle 31 by means of the spring detentcatch 90 which is disposed inside the outside spindle 31. A locking baractuator 91 which is adapted to pull the locking bar 80 into the doggingposition by the turning of the key 88 is disposed intermediate theslotted connector 39 and the end of the locking bar 80. The actuator 91consists of an outside cylinder 92 having a closed end 93 through whichprotrudes a connector bar 94 which is adapted to engage the slottedconnector 89. A spring pressed button 96 is provided inside the cyiinder92 there being a washer 95 connected to the connector bar 94 adapted tomove inside the button against the coil spring 97 inside the button, sothat both the button and the connector bar 94 may be moved against thespring. A helical groove 98 is cut in the wall of cylinder 92 betweenthe open end and the button 96 so that it engages the dogging arm 82 ofthe looking bar 80 and upon the turning of the key 88 in one directionwill pull the locking bar 81) toward the outside knob 32 so that thetrip catch 83 engages the edge .34 of the retractor opening 81 andthereby holds the locking bar 30 in a position to dog the outsidespindle 31. The dogging arm 32 projects into the longitudinal slot 99 inthe outside tubular spindle 31, the dogging arm 82 also extending intothe longitudinal dogging groove 100 in the outside bearing sleeve 29.The end 181 of the locking bar 80 is preferably rounded and arranged topress against the indented end of the button 96 in the locking baractuator 91, the spring 97 acting against this button keeping thelocking bar under spring pressure tending to thrust the button towardthe inside door knob 42.

in the operation of my lock, the pressing of the push button 78 in theinside knob 42 causes the dogging arm 82 of the locking bar 86 to dogthe outside spindle 31 to the dogging groove 100 in the bearing sleeve29 for the outside spindle 31. The trip catch 83 on the locking bar 81)engages the retractor edge 84 so that the locking bar is held in doggingposition until the trip catch isreleased by the inward or latchwithdrawing movement of the retractor such as would occur when the dooris closed and the latch bar was thrust inwardly on contacting the strikeplate and thereby moving the retractor. This inward movement of theretractor releases the trip catch 83 and undogs the outside knob, whichmay then be turned in either direction of rotation to actuate theretractor and spring latch. With the outside knob free to turn, theoutside spindle may again be dogged and the outside knob renderednonturnable by the turning of the key 88 in one direction, which rotatesthe connector bar 94 and the outside cylinder 92 of the locking baractuator 91. The helical groove 98 thereby engages the dogging arm 82and pulls the locking bar into the dogging position, the trip catch 83again engaging the retractor edge 84 and holding the locking bar 80 inlocked or dogging position.

This mechanism prevents 'the occupant from locking himself out withoutkeys, it being necessary to positively actuate the locking mechanismwith the portable key 88 in order to lock the door from the outside.

I claim:

1. In a door knob lock and latch set of the type described having aspring biased latch, a retractor housing and a latch retractor, saidretractor being separately actuated by inside and outside spindles towhich inside and outside knobs are attached respectively, and having apush button in the inside knob; a dogging bar having a right angleddogging arm operatively connected to said push button and extendingthrough said inside spindle and said latch retractor into said outsidespindle, a trip catch on said dogging bar adapted to engage an edge ofsaid retractor to releasably hold said dogging bar in dogging positionwhen said retractor is in normal non-retracting position, a slot in saidoutside spindle, said slot being arranged to at times receive thedogging arm of said dogging bar to dog said outside spindle to saidretractor housing, a key-operated cylinder lock mechanism in said outerknob, an actuator for said locking bar operatively connected to saidcylinder lock mechanism, whereby the locking bar may be drawn intodogging position by the turning of said cylinder lock mechanism by aremovable key.

2. The door knob lock and latch set as defined in claim 1, in which theactuator for said locking bar comprises a helically slotted cylinderdisposed within the outside spindle and adapted to engage the doggingarm of said dogging bar, said cylinder being operatively connected forturning to the key operable lock mechanism in the outer knob.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,395,414 Huffman Nov. 1, 1921 1,755,434 Ellingson Apr. 22,1930 1,876,576 Arste Sept. 13, 1932 1,991,031 Schlage Feb. 12, 19352,282,213 Rolph May 5, 1942 2,413,733 Schlage Jan. 7, 1947

